/ Thesaurus / B Synonyms of bison bonasus Find synonyms for: Noun1. wisent, aurochs, Bison bonasus, bisonusage: European bison having a smaller and higher head than the North American bisonWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: sumptuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language